354903 - [mac] CPU spike when opening slate.com feed in tabs

Status: RESOLVED INVALID

(Firefox :: General, defect)

Description

[Marcia Knous [:marcia]]

Seen using Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.8.1) Gecko/20060929 BonEcho/2.0.

STR:

1. Open the slate.com (opens ~80 tabs) or abcnews.com (~54 tabs) RSS feed in tabs.

Observe high CPU spike (75-80%) on both a PPC Mac and an Intel Mac. On my Intel Mac, the machine becomes almost totally unresponsive. I tested this on a Win XP machine and the CPU rate ran closer to 50% during the loading time.

Comment 1

[Phil Ringnalda (:philor)]

Not sure where to toss this hot potato - not RSS D&P, since it just passes a feed URI to Bookmarks/Places; not even Live Bookmark specific, since the open in tabs code doesn't know if the URIs it's opening come from a folder of regular bookmarks or a livemark folder; I'd bet not bookmark-specific, except that there aren't many other ways to open that many tabs all at once.

Do you see the same sort of load if, after opening 80 tabs, you clear your cache, set the pref to restore your session, and then close and reopen Firefox? Or are we just horribly expensive opening tabs on Mac in general? I can get both my CPUs up to around 60% by just holding down Cmd-T, opening empty tabs.

Comment 2

[Wayne Mery (:wsmwk)]

Frankie can you reproduce?

Comment 3

[Frankie]

I don't have FF2 any more, can't test this RSS bug.

Comment 4

[Mark Banner (:standard8)]

RSS has recently been removed from Firefox, so the link is now treated as an external one. Hence, this is no longer valid.